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Dorsal spines (total): 1; Dorsal
soft rays (total): 6; Anal soft rays: 6. Lateral line ossicles
66-70; pectoral spine with serrations on the anterior (27-29)
and posterior (6-15) edges. Can be differentiated from Sisor
chennuah and Sisor torosus in having a more slender
body (body depth at anus 5-5.4% vs. 5.6-7.8) and from Sisor
rheophilus in possessing a smaller eye (9.4-12.2% HL vs.
13.2-16.3) and a shorter snout (53.9-55.7% HL vs. 56.2-60.3).
Reported to be the only Asian catfish to have bony plates on
the surface of the body. Remarks: In some literature
the species name is sometimes spelt as rhabdophorus.